The partitioning method when Vista enables BitLocker

If the BitLocker feature is to be used successfully, there must be at least two active partitions on the hard disk, and the extra active partitions must remain unencrypted (and must be the NTFS file system), in addition to the system disk, while the free space cannot be less than 1.5GB

Because your d and e are logical drives on the extended partition, you cannot implement them. The only way is to shrink the capacity of C disk (using the Shrink partitioning feature in diskmgmt.msc), shrink out at least 1.5GB of unallocated space, and then create an NTFS primary partition with these unallocated spaces

If you are using Windows Vista flagship, you can download a "BitLocker and EFS Enhancement" software via Windows Update, which automatically adjusts the partitions to ensure that the data is not corrupted to meet the needs of BitLocker

If you have not installed the system, after using CD-ROM boot select repair, enter the CMD environment, run the following command:

The command/purpose to run

diskpart/boot Diskpart.exe, this is a hard disk partition adjustment program under the command line interface

Select Disk 0/Select the first hard drive as the target disk for subsequent operations. If you have more than one hard disk and you want to install Windows Vista on a different hard disk, change the number "0" to the target hard drive. If you want to know which hard drives are each and what their numbers are, run the list disk command first

clean/Empty the partition table information on the selected hard drive. Note: If there is data on the target hard drive, it will be cleared

Create Partition Primary size=1500/creates a primary partition with a volume of 1.5GB, which is used to save the boot file later

Assign letter=s/Set the disk character of this 1.5GB partition to "S", or any other letter that you want to use, but it is not recommended to use "C", after all, many people are accustomed to install Windows to the C disk

active/set this 1.5GB partition as active partition

Create Partition primary/creates a primary partition with all remaining space (if you want other partitions to be created in addition to this primary partition, use the "size=xxx" parameter to specify the size of the primary partition)

Assign letter=c/Sets the disk character for this partition to "C", and then installs Windows to this partition, which is the same partition that will eventually be encrypted by BitLocker.

List volume/View the areas that have been divided

exit/Exit DiskPart program

Format c:/y/q/fs:ntfs/Use the NTFS file system for quick formatting of C disk

Format s:/y/q/fs:ntfs/fast format s disk with NTFS file system